Sparse Sampling for Real-Time Ray Tracing
2018, Viitanen, T., Koskela, M., Immonen, K., Mäkitalo, M., Jääskeläinen, P. and Takala, J., In Proceedings of the 13th International Conference on Computer Graphics Theory and Applications (GRAPP).
Abstract: Ray tracing is an interesting rendering technique, but remains too slow for real-time applications. There are various algorithmic methods to speed up ray tracing through uneven screen-space sampling, e.g., foveated rendering where sampling is directed by eye tracking. Uneven sampling methods tend to require at least one sample per pixel, limiting their use in real-time rendering. We review recent work on image reconstruction from arbitrarily distributed samples, and argue that these will play major role in the future of real-time ray tracing, allowing a larger fraction of samples to be focused on regions of interest. Potential implementation approaches and challenges are discussed.